feat: add web campaign links — capture, auth integration, bonus UI

- Add campaign.ts utility (capture from URL, localStorage with TTL, validation)
- Pass campaign_slug in all auth API methods (telegram, widget, email, oauth)
- Consume slug in auth store login methods, set pendingCampaignBonus state
- Add CampaignBonusNotifier component (toast on bonus, mounted in AppShell)
- Show web_link alongside bot deep_link in AdminCampaignStats
- Add CampaignBonusInfo type with union bonus_type
- Fix VerifyEmail: ref guard against StrictMode double-fire, setTimeout cleanup
- Fix AdminCampaignStats: setTimeout refs with cleanup, i18n-aware locale
- Wrap all localStorage access in try/catch (Safari private browsing safety)
- Add campaignBonus translations (ru/en/fa/zh)

src/locales/fa.json

@@ -64,6 +64,12 @@
     "newUserReply": "کاربر در تیکت پاسخ داد: {{title}}",
     "newUserReplyTitle": "پاسخ کاربر"
   },
+  "campaignBonus": {
+    "title": "!پاداش فعال شد",
+    "balance": "شما {{amount}} روبل از کمپین «{{name}}» دریافت کردید",
+    "subscription": "شما اشتراک {{days}} روزه از کمپین «{{name}}» دریافت کردید",
+    "tariff": "شما تعرفه «{{tariff}}» از کمپین «{{name}}» دریافت کردید"
+  },
   "wsNotifications": {
     "balance": {
       "topupTitle": "موجودی شارژ شد",
@@ -1421,6 +1427,8 @@
         "inactive": "غیرفعال",
         "copy": "کپی",
         "copied": "کپی شد!",
+        "botLink": "لینک ربات",
+        "webLink": "لینک وب",
         "users": "کاربران",
         "noUsers": "کاربر ثبت‌نام شده‌ای وجود ندارد",
         "paid": "پرداخت کرده",